/*
 * Copyright (C) 2018 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef EXT_PCM_H
#define EXT_PCM_H

#include <pthread.h>

#include <cutils/hashmap.h>
#include <tinyalsa/asoundlib.h>

#include "device_config.h"

#define BAHAL_SUPPORT_DYNAMIC_BIT_FORMAT
//frame_size * frame_count * channels
#define MIXER_FRAME_BUFFER_SIZE (OUT_PERIOD_SIZE_DEFAULT * DEFAULT_OUT_PERIOD_COUNT * VIRTIO_MAX_CHANNEL_COUNT)

#if (DEFAULT_BIT_WIDTH == 4)
#define BUFFER_ITEM_TYPE uint32_t
#elif (DEFAULT_BIT_WIDTH == 2)
#define BUFFER_ITEM_TYPE int16_t
#endif

struct ext_mixer_pipeline {
#ifdef BAHAL_SUPPORT_DYNAMIC_BIT_FORMAT
  uint8_t buffer[MIXER_FRAME_BUFFER_SIZE * sizeof(uint32_t)];
#else
BUFFER_ITEM_TYPE buffer[MIXER_FRAME_BUFFER_SIZE];
#endif
  unsigned int position;
};

struct ext_pcm {
  struct pcm *pcm;
  pthread_mutex_t lock;
  pthread_cond_t mixer_wake;
  bool run_mixer;
  unsigned int ref_count;
  pthread_mutex_t mixer_lock;
  struct ext_mixer_pipeline mixer_pipeline;
  pthread_t mixer_thread;
  Hashmap *mixer_pipeline_map;
  int card_id;
  int device_id;
  int period_size;
  int period_count;
  int src_channels;
  int dest_channels;
  int bit_width;
};

struct ext_pcm *ext_pcm_open(unsigned int card, unsigned int device,
                             unsigned int flags, struct pcm_config *config, int src_channels);
int ext_pcm_close(struct ext_pcm *ext_pcm);
int ext_pcm_is_ready(struct ext_pcm *ext_pcm);
int ext_pcm_write(struct ext_pcm *ext_pcm, const char *bus_address,
                  const void *data, unsigned int count);
const char *ext_pcm_get_error(struct ext_pcm *ext_pcm);
unsigned int ext_pcm_frames_to_bytes(struct ext_pcm *ext_pcm, struct pcm_config* local_config,
                                     unsigned int frames);
int ext_get_bit_width_from_format(enum pcm_format format);
#endif  // EXT_PCM_H
